Pneumatic core for block machines



April 12 1927. l

A A. ADAMS PNEUMATIC .CORE FOR BLOCK MAcxivINEs Filed fui-arch 15, 1926 [Ill/Ill I `l ATTORNEYS. v

Patenten Apaizgiezz. l e 1,624,704 f UNITED STATES PATENT OFFICE.: l Asn Anniv-TS, or cRAwFoRDsvILLE, INDiANA, nssreivon- To LAMQRE TILE MAQHTNE l confirm, or cRAwFoRDsvILLE, INDIANA A coRPonA'rIoN.-

fPNEn/MTIC' 'conn fron. Broer; MACHINES. Appiicatio ied March i5, 192s. serial No.. 94,645. l

This invention relates toa pneumatic core' partially collapse the core. On the threaded device. l

The Chief object 'of 'this inventari is to construct .a corendevice `of an improved ar-A to ready and accurate 4seating in a mold and ready removal therefrom following the ap'- plication of pressure to the core for its expansion and following its contraction respectively. 1 5 f The chief feature-of the linvention consists in the particular 'formation of the core and especially the central vsupport and method of mounting the several end parts thereon and the clamping of the ends of the inflatable bag to the end members. i

The full natureof the invention will be understood from the accompanying drawings and the followingA description and claims: l

the drawings Fig. 1 shows one applicationA of the invention in operative relation; Fig. 2 shows a molded block formed with the invention. Fig..` 3 is an enlarged. central.

sectional view of the. invention applied to pneumatic molding'of building block or tile with the neumatic core in an inflated condition. igQILis asimilarview of the parts shown in Fig. 3 except that thev pneumatic core is in deflated condition prior to inflation and the formation of the opening in the block tothe desired dimensions.

In the drawings merely by way of illustration of one use offthe invention, there isv illustrated, a mold having opposite sides 10 'to which are hinged orotherwise secured,

apertured sides 11 having the aperture 12 therein. Moldable material 13 forms the block 14 having the 'opening 15 therein which correspondsto the inflated condition or outline of the core.

The pneumatic core central rod.16 having't readed ends 17 and 18. Adjacent one threaded end is -a stop material and is expansible and contractible.-

Fig. 3 illustrates the bag in its expanded n condition, that is, expanded to its normal dimensions in contra-distinction to its arrangement when utilized 1n molding as shown in Fig. 4, wherein the moldable ma.

terial isiof suiiicient weight and-density to er se consists of al end 17 is threaded a truncated cone 23 having the taperedexterior '24. Cones y2O and 23 together with the rod enveloping bag g form a'closed chamber.'4

Longitudinally slidable and rotatable as well on the end 17 ofthe rod' 16,-is a cap member 25 having a recess 26 and a-.rod receiving laperture 27. A peripheralgange l portion 28 'has its.' wall complementarily formed or tapered'so that it @an have -longitudinal movement and receive the end of tour suitably formed as it 29l sc that the same is a continuation of and'gradual re-l duction of the exterior'oi:l the clamping memf ber "or cap 25. 'This nut also completely en' closes the threaded end 17 and. the rod 16,.

andthe free end 'of said nut is suitably ,formed as at 30 for tool reception, whereby said nut maybe easily threadedvv upon and -untlircaded from said stem.

The opposite endl of the core includes ai .combination cap 31, which includes 'a periph* eral flange 32 which ybears against the side.

wall 1l adjacent the opening 12,y the cap body portion being receivable in said openlng. Said opening receivable portion includes the longitudinally extending peripheralptlange 33 which is'recessed and has its. inner wall 34 complementarily tapered to clampingly receive the end of thejinlatable bag 22 and the cone 20. vThe inner face 'of t-herecessed cap includesan annular groove 35. Projecting outwardly from the body portion is a vtubular extension 36 'having the channel 37 therein. Suitable -i'neans connect 'the' same ,to a source of pressure, preferably air although other mediums of vHuid pressure may be employed. The body portion has a' rcentral passage 38 which communicates with thepassage 37, and said passage 38 is threaded as at 39 to receive-the -threaded end 1 8 ion of the. rod 416. A plurality of inclined pas- Sages 40 connect through the enlarged passage 37 to the annular groove 40,said groove forming a chamber with which the passages 41 in th'e truncated `cone 20 communicate.

Thus pressure can be applied' at 37 and. inj Hate the bag from the position shown in maintain said bag in that position until themoldable materialfhas permanently assumed its final form following which the bag may again be deflated if desired.

The invention claimed is:

` 1L A pneumatic core device comprising a rod threaded at one end, a pressure inflatable bag envelopingsaid rod, an outwardly tapered member positionablewithin one end of the bag for supporting the same and mounted on said rod, and a recessed cap having a complementaryv taper for clampingly receiving the bag end and securing the same between the cap and the supporting mem-` ,receiving the bag end and securing the same between the cap andthe supporting member, Said cap and said tapered supporting member including communicating passages for supplying pressure to and releasing pressure from said bag, said capincludin'g laterally projecting means for limiting longitudinal vmovement ofthe device when mounted for use.

3. A pneumatic core device, comprising a rod threaded at one end, a pressure inflatable bag enveloping said rod, an outwardly tapered member positionablel within one end of the bag for supporting the same and mounted on said rod, and a recessedcap having a co plementary taper for clampingly receiving the bag end and securing the same between the cap and the supporting member, said cap being Aslidable on said rod and so formed that the threaded .end of the rod projects beyond the cap immediately adjaycent thereto, and an ornamental nut threadfixed my signature.

edlyreceiving the end ofthe rod and coinplementarily enclosing the same, said ornav fexterior terminal formation for threadingsaid nut upon said rod.

4. A pneumatic core device comprising a rod threaded at bothv ends, -'a pressure inflatable bag enveloping said rod,'a pair of bag supporting .members positionable within and at. the ends of thebag and having an outwardly tapered exterior and supported on said rod in spaced relation, a pair otrecessed clamping members, the recess being complementarily tapered lfor receiving the ends of the bag and clamping the same upon the bag supporting members, said clamping members being movable longitudinally of' the rod for such clamping engagement, one of said bag supporting members and the adjacent and cooperatingclamping lmem'berincluding a communicating passage for supplying pressure to and. permitting exhaustion ofpressure romisaid bag# 5. A pressure supplying clamping construction support for a pneumatic core including a. rod, an iniatable bag surrounding the same, a bag supporting member supportc" i ed by said rod within said bag and havingv an' outwardly tapered periphery, and a clamping mei'nber-recessed to receive the end ot' the bag and clamp the :same to' a b'ag supporting member and. threadedly` movable upon said rod for securing such clamping engagement, said bag supporting member including a passage therethrough, said 4clamping member including an annular groove in the recessedportion or-registration/with the passage of the bag supporting member, and

-an inclined passage leading from said annular groove to the threaded rod receivingrecess for supplying pressure. to and releasing pressure from said inflatable bag. I

In witness-whereof, I have hereunto af- ASHy ADAMS. 

